package Day02;

public class VarDemo {
    public static void main(String[] args) {
        int a = 1;
        a = 3;
        int b,c,d;
        b = 3;
        b = b + 4;
        int e = 123,f = 456;
        System.out.println(a+" "+b);

        a = a+10;
        System.out.println(a);

        a = a * 100;
        System.out.println(a);

        int a_b;
        int a$b;
        int _b1;
        int a1$;
        int $1;
        //System.out.println(A_a);//严格区分大小写
        int 年龄;//不建议
        int nianling;//不建议
        int age,myAge,myFatherAge;
        //类命名大驼峰,标识符小驼峰
    }

}
